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