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