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