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)(33,34,39,42)(35,40,46,54)(36,47,49,58)(37,43,38,51)(41,52,57,48)(44,59,62,64)(45,55,50,56)(53,60,63,61)(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)(33,35,39,46)(34,40,42,54)(36,44,49,62)(37,50,38,45)(41,53,57,63)(43,56,51,55)(47,59,58,64)(48,61,52,60)(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)(34,41)(35,44)(37,48)(38,52)(39,49)(40,53)(42,57)(43,58)(45,60)(46,62)(47,51)(50,61)(54,63)(55,59)(56,64) involution — undirected(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)(34,42)(40,54)(41,57)(43,51)(47,58)(53,63)(55,56)(59,64)(2,9)(3,13)(8,25)(10,18)(12,30)(14,19)(15,31)(26,28)(33,37,39,38)(34,43,42,51)(35,45,46,50)(36,48,49,52)(40,55,54,56)(41,58,57,47)(44,60,62,61)(53,59,63,64)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.