One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,7,12,5,10,6,11)(3,4,9,14,13,8,15,16)(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)(2,8,10,4)(5,13)(6,9)(7,15)(11,16,12,14)(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)(1,4,5,8)(2,9)(3,12)(6,14,7,16)(10,15)(11,13)(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.