{{Graph[C1[9], C1[12], C1[10], C1[11], Dashed[9, 11], Dashed[9, 10], 
    Dashed[11, 12], Dashed[10, 12], OV[1, 5, 6], OV[3, 6, 8], OV[4, 5, 7], 
    OV[2, 7, 8]], Graph[C1[12], C1[12], C1[10], C1[11], Dashed[9, 12], 
    Dashed[9, 11], Dashed[9, 10], Dashed[10, 11], OV[5, 6, 7], OV[3, 7, 8], 
    OV[4, 6, 8], OV[1, 2, 5]], 
   Graph[C1[12], C1[12], C1[11], C1[10], Dashed[9, 11], Dashed[9, 11], 
    Dashed[9, 10], Dashed[10, 12], OV[5, 6, 7], OV[4, 7, 8], OV[3, 5, 6], 
    OV[1, 2, 8]], Graph[C1[11], C1[12], C1[12], C1[11], Dashed[10, 12], 
    Dashed[9, 11], Dashed[9, 10], Dashed[9, 10], OV[6, 7, 8], OV[5, 7, 8], 
    OV[1, 4, 6], OV[2, 3, 5]]}, 
  {BasisVector[2], BasisVector[3], BasisVector[4]}}