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)(19,29,37,24,31,25,32,41)(20,26,39,48,36,45,35,44)(30,43,47,40,34,42,33,46)(9,10)(11,15)(12,14)(13,16)(17,19,22,31)(18,24,28,41)(20,33,36,47)(21,37,23,32)(25,38,29,27)(26,43,45,42)(30,39,34,35)(40,48,46,44)(1,3,5,4)(2,6,7,8)(9,11,12,16)(10,13,14,15)(17,19)(18,25)(20,34)(21,32)(22,31)(23,37)(24,27)(26,43)(28,29)(30,36)(33,39)(35,47)(38,41)(40,48)(42,45)(44,46)(11,16)(13,15)(17,20,23,39,22,36,21,35)(18,26,38,48,28,45,27,44)(19,30,37,47,31,34,32,33)(24,40,25,42,41,46,29,43)(1,4,5,3)(2,6,7,8)(10,14)(13,15)(19,31)(24,41)(25,29)(30,34)(32,37)(33,47)(40,46)(42,43)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.