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