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