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