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