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