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