\documentclass{standalone}
\usepackage[paperwidth=\maxdimen,paperheight=\maxdimen]{geometry}
\usepackage{pgf,tikz}
\begin{document}

\begin{tikzpicture}[x=24pt, y=24pt, draw=white, double=black, line width=2.1pt]
	\node (4) at (1, 0) {$4$};
	\node (5) at (6, 0) {$5$};
	\node (1) at (17, 0) {$1$};
	\node (2) at (24, 0) {$2$};
	\node (6) at (38, 0) {$6$};
	\node (3) at (45, 0) {$3$};

	\draw[double=white,draw=green] (4) -- (1, -8) -- (22, -8) -- (22, 7) -- (6, 7) -- (5);
	\draw[double=white,draw=blue] (6) -- (38, -8) -- (23, -8) -- (23, 10) -- (4, 10) -- (4, -6) -- (17, -6) -- (1);
	\draw[double=white,draw=red] (2) -- (24, 7) -- (45, 7) -- (3);
	\draw[double=green] (3) -- (45, -7) -- (31, -7) -- (31, 8) -- (15, 8) -- (15, -2) -- (19, -2) -- (19, 3) -- (27, 3) -- (27, -10) -- (9, -10) -- (9, 15) -- (37, 15) -- (37, -1) -- (39, -1) -- (39, 17) -- (3, 17) -- (3, -15) -- (47, -15) -- (47, 2) -- (43, 2) -- (43, -5) -- (33, -5) -- (33, 11) -- (13, 11) -- (13, -4) -- (21, -4) -- (21, 1) -- (25, 1) -- (25, -7) -- (11, -7) -- (11, 13) -- (35, 13) -- (35, -3) -- (41, -3) -- (41, 4) -- (49, 4) -- (49, -17) -- (0, -17) -- (0, 0) -- (4);
	\draw[double=blue] (5) -- (6, -13) -- (30, -13) -- (30, 6) -- (16, 6) -- (16, -1) -- (18, -1) -- (18, 4) -- (28, 4) -- (28, -11) -- (8, -11) -- (8, 16) -- (38, 16) -- (6);
	\draw[double=red] (1) -- (17, 5) -- (29, 5) -- (29, -12) -- (7, -12) -- (7, 1) -- (5, 1) -- (5, -14) -- (46, -14) -- (46, 1) -- (44, 1) -- (44, -6) -- (32, -6) -- (32, 9) -- (14, 9) -- (14, -3) -- (20, -3) -- (20, 2) -- (26, 2) -- (26, -9) -- (10, -9) -- (10, 14) -- (36, 14) -- (36, -2) -- (40, -2) -- (40, 18) -- (2, 18) -- (2, -16) -- (48, -16) -- (48, 3) -- (42, 3) -- (42, -4) -- (34, -4) -- (34, 12) -- (12, 12) -- (12, -5) -- (24, -5) -- (2);
\end{tikzpicture}
\end{document}