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