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