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