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