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