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