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