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