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