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