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