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