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