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