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