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