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