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)(17,18,23,26)(19,27,30,21)(20,25,22,24)(28,31,29,32)(36,47)(41,50)(44,57)(48,60)(52,55)(54,61)(58,64)(62,63)(4,12)(7,14)(10,16)(13,15)(17,19,23,30)(18,21,26,27)(20,28,22,29)(24,31,25,32)(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)(17,19)(18,21)(20,28)(22,29)(23,30)(24,31)(25,32)(26,27)(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)(17,20,23,22)(18,24,26,25)(19,28,30,29)(21,31,27,32)(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)(17,21)(18,19)(20,31)(22,32)(23,27)(24,28)(25,29)(26,30)(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)(17,22,23,20)(18,25,26,24)(19,29,30,28)(21,32,27,31)(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.