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