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