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