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