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