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