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