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