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