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