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