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