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