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