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