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