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