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