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