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