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