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