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)(19,24,30,40)(20,31,34,47)(21,26,22,37)(25,33,43,35)(28,44,32,46)(29,39,36,41)(38,48,42,45)(1,3)(2,5)(4,8)(6,7)(9,10,12,13)(11,15,16,14)(17,19,23,30)(18,24,27,40)(20,32,34,28)(21,36,22,29)(25,42,43,38)(26,41,37,39)(31,46,47,44)(33,45,35,48)(10,13)(14,15)(17,20,21,33,23,34,22,35)(18,25,37,47,27,43,26,31)(19,28,36,48,30,32,29,45)(24,38,39,46,40,42,41,44)(2,6)(5,7)(17,21,23,22)(18,26,27,37)(19,29,30,36)(20,33,34,35)(24,39,40,41)(25,31,43,47)(28,45,32,48)(38,46,42,44)(3,8)(5,7)(9,11,12,16)(10,14,13,15)(19,30)(20,34)(24,40)(25,43)(29,36)(31,47)(33,35)(39,41)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.