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