One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,7)(5,8)(9,10)(11,13)(12,14)(15,16)(17,18)(19,27)(20,21)(22,25)(23,26)(24,29)(28,36)(30,46)(31,44)(32,34)(33,35)(37,48)(38,43)(39,41)(40,47)(42,45) involution — undirected(1,3)(2,5)(4,8)(6,7)(9,11)(10,13)(12,15)(14,16)(17,19,21,29)(18,24,20,27)(22,36,34,45)(23,39,35,31)(25,42,32,28)(26,44,33,41)(30,48,47,38)(37,46,43,40)(1,3)(2,6)(4,8)(5,7)(10,14)(13,16)(17,20,21,18)(19,28,29,42)(22,37,34,43)(23,26,35,33)(24,36,27,45)(25,38,32,48)(30,44,47,41)(31,46,39,40)(3,8)(5,6)(11,15)(13,16)(18,20)(24,27)(25,32)(26,33)(28,42)(37,43)(40,46)(41,44) 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.