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)(35,40,42,36)(37,45,47,41)(43,44,48,46)(9,10,13,12)(11,14,15,16)(18,22)(23,28)(24,29)(30,32)(34,39)(35,42)(41,45)(43,48)(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)(34,40)(36,39)(37,43)(38,42)(41,46)(44,45)(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)(33,36,38,40)(34,35,39,42)(37,46,47,44)(41,48,45,43)(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)(34,41,39,45)(35,43,42,48)(36,44,40,46)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.