One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,4)(5,6,9,15,12,17,11,34)(7,18,21,44,24,46,23,57)(8,25,27,36,30,59,29,60)(10,32,31,42,33,61,26,16)(13,35,37,53,39,52,62,20)(14,19,40,48,41,49,58,28)(22,55,54,65,56,68,50,45)(38,51,43,47,63,66,64,67)(5,7,19,47,33,56,8,20,9,21,48,66,26,50,27,35,12,24,49,67,10,22,30,53,11,23,28,51,31,54,29,52)(6,13,36,55,42,63,41,46,34,62,25,45,32,43,40,44,17,39,60,68,16,38,14,18,15,37,59,65,61,64,58,57)(2,4) involution — undirectedA 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.