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