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