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