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