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