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