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