One vertex per element, one color per generator, with an edge from x to x·s.
(1,2) involution — undirected(3,4,7,6)(5,9,10,8)(11,12)(13,22)(14,26)(15,20)(16,21)(17,30)(18,25)(19,27)(23,38)(24,34)(28,35)(29,33)(31,36)(32,39)(37,41)(40,42)(3,5)(4,8)(6,9)(7,10)(11,13)(12,18)(14,23)(15,29)(16,25)(17,24)(19,32)(20,34)(21,22)(26,42)(27,41)(28,40)(30,33)(31,39)(35,38)(36,37) involution — undirected(3,6,7,4)(5,9,10,8)(11,14,16,28)(12,19,21,36)(13,23,25,40)(15,27,17,31)(18,32,22,37)(20,35,30,26)(24,39,29,41)(33,42,34,38)(5,10)(8,9)(11,15,16,17)(12,20,21,30)(13,24,25,29)(14,27,28,31)(18,33,22,34)(19,35,36,26)(23,39,40,41)(32,42,37,38)(12,21)(13,25)(19,36)(20,30)(23,40)(24,29)(26,35)(39,41) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.