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