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