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