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