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