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