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