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