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