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