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