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