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