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