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