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