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