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