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