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)(20,31,29,40,34,37,32,25)(21,26,36,38,35,41,30,42)(33,44,43,48,46,47,45,39)(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)(21,30,35,36)(25,31,40,37)(26,38,41,42)(33,45,46,43)(39,44,48,47)(10,14)(15,16)(17,20,22,34)(18,25,27,40)(19,29,23,32)(21,33,35,46)(24,37,28,31)(26,39,41,48)(30,43,36,45)(38,47,42,44)(2,6)(5,7)(9,11,13,12)(10,15,14,16)(17,21,22,35)(18,26,27,41)(19,30,23,36)(20,33,34,46)(24,38,28,42)(25,39,40,48)(29,43,32,45)(31,44,37,47)(3,8)(5,7)(9,12,13,11)(10,15,14,16)(18,27)(21,35)(24,28)(25,40)(30,36)(31,37)(33,46)(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.