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