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