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