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