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