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