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)(28,37)(30,43)(31,44)(33,45)(34,42)(35,41)(38,46)(39,47)(40,48) involution — undirected(9,10)(11,16)(12,15)(13,14)(17,19,22,32,23,33,37,48)(18,24,28,29,27,40,36,45)(20,31,34,47,21,30,35,46)(25,39,41,44,26,38,42,43)(2,5)(6,8)(10,14)(15,16)(17,20)(18,25)(19,30)(21,23)(22,34)(24,38)(26,27)(28,41)(29,43)(31,33)(32,46)(35,37)(36,42)(39,40)(44,45)(47,48) involution — undirected(9,11,13,12)(10,15,14,16)(17,21,23,20)(18,26,27,25)(19,31,33,30)(22,35,37,34)(24,39,40,38)(28,42,36,41)(29,44,45,43)(32,47,48,46)(1,3,4,7)(2,6,5,8)(9,12,13,11)(10,15,14,16)(18,27)(20,21)(24,40)(28,36)(29,45)(30,31)(34,35)(46,47)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.