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