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