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