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