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