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