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