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