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