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