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