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