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