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