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