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