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