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