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