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