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