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