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