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