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