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