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)(19,28,33,41)(20,34,35,42)(21,25,29,26)(23,31,39,32)(24,36,40,37)(30,44,45,38)(43,47,48,46)(1,3,5,4)(2,6,8,7)(9,10)(11,14)(12,13)(15,16)(17,19,29,31,22,33,21,32)(18,23,25,41,27,39,26,28)(20,30,36,47,35,45,37,46)(24,38,42,48,40,44,34,43)(1,3,5,4)(2,7,8,6)(10,13)(14,16)(17,20,29,36,22,35,21,37)(18,24,25,42,27,40,26,34)(19,30,31,47,33,45,32,46)(23,38,41,48,39,44,28,43)(1,4,5,3)(2,6,8,7)(9,11)(10,14)(12,15)(13,16)(20,35)(24,40)(30,45)(34,42)(36,37)(38,44)(43,48)(46,47)(11,15)(14,16)(17,21,22,29)(18,25,27,26)(19,31,33,32)(20,36,35,37)(23,28,39,41)(24,34,40,42)(30,46,45,47)(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.