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