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