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