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