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