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