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