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