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