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)(11,14)(12,15)(13,16)(17,18,22,27)(19,24,31,40)(20,32,35,25)(21,37,23,26)(28,45,46,38)(29,39,30,41)(33,48,47,42)(34,43,36,44)(2,5)(6,8)(9,11,13,12)(10,14,16,15)(17,19)(18,24)(20,33)(21,30)(22,31)(23,29)(25,42)(26,39)(27,40)(28,36)(32,48)(34,46)(35,47)(37,41)(38,43)(44,45)(9,11,13,12)(10,15,16,14)(17,20,22,35)(18,25,27,32)(19,28,31,46)(21,36,23,34)(24,38,40,45)(26,44,37,43)(29,33,30,47)(39,42,41,48)(9,12,13,11)(10,15,16,14)(19,29)(21,23)(24,39)(26,37)(28,33)(30,31)(34,36)(38,42)(40,41)(43,44)(45,48)(46,47)(1,3,4,7)(2,6,5,8)(17,21,22,23)(18,26,27,37)(19,30,31,29)(20,34,35,36)(24,39,40,41)(25,43,32,44)(28,33,46,47)(38,48,45,42)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.