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