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