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