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