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