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