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