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