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