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