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