I believe you want 32/46 of a pound of sugar. I believe that would give you 1.032 SG, or 8.5 Brix (8.05 Plato).

One pound of sugar gives you 46 points per gallon (technically, that's a gallon of solution of sugar and water, which will actually require slightly less than a gallon of water, but since we're worried about how much sugar we need, let's ignore that for now). That means each 1/46 of a pound of sugar gives you 1 point per gallon. If you want 32 points, you need 32 times 1/46 of a pound of sugar, or 32/46 of a pound. That's 11.13 ounces.

To make such a solution, you would dissolve the sugar in something less than a gallon (say a half-gallon, for arguments sake). Then you would add water until the volume of the solution equals a gallon. If you start with a gallon of water, you will have a little left over when you are done.