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