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