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