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