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