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