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