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