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