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