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