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