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