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