One vertex per element, one color per generator, with an edge from x to x·s.
(1,2) involution — undirected(3,4)(5,9)(6,8)(7,10)(11,12,16,20)(13,17,22,32)(14,24,27,36)(15,28,30,19)(18,29,35,26)(21,37,25,42)(23,40,39,33)(31,41,34,38)(3,5)(4,7)(6,10)(8,9)(11,13)(12,17)(14,25)(15,23)(16,22)(18,34)(19,33)(20,32)(21,27)(24,42)(26,41)(28,40)(29,38)(30,39)(31,35)(36,37) involution — undirected(11,14,16,27)(12,18,20,35)(13,21,22,25)(15,29,30,26)(17,31,32,34)(19,36,28,24)(23,41,39,38)(33,42,40,37)(5,10)(7,9)(11,13)(12,17)(14,21)(15,23)(16,22)(18,31)(19,33)(20,32)(24,37)(25,27)(26,38)(28,40)(29,41)(30,39)(34,35)(36,42) involution — undirected(4,8)(7,9)(13,22)(17,32)(21,25)(23,39)(31,34)(33,40)(37,42)(38,41) 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.