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