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