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