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