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)(22,36)(23,27)(25,34)(28,42)(29,38)(30,39)(31,40)(33,41)(35,46)(37,43)(44,48)(45,47)(1,3,4,8)(2,5,6,7)(9,11)(10,13)(12,16)(14,15)(17,19,23,31)(18,24,27,40)(20,28,35,45)(21,30,22,29)(25,37,41,48)(26,39,36,38)(32,42,46,47)(33,44,34,43)(11,16)(13,14)(17,20,21,33,23,35,22,34)(18,25,36,46,27,41,26,32)(19,28,30,44,31,45,29,43)(24,37,38,47,40,48,39,42)(9,11)(10,14)(12,16)(13,15)(17,21,23,22)(18,26,27,36)(19,29,31,30)(20,33,35,34)(24,38,40,39)(25,32,41,46)(28,43,45,44)(37,47,48,42)(11,16)(13,14)(17,21,23,22)(18,26,27,36)(19,30,31,29)(20,33,35,34)(24,39,40,38)(25,32,41,46)(28,44,45,43)(37,42,48,47)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.