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