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