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