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