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