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