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