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