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