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