If Hunter provided a wiring schematic for their dehumidifiers, you would had a response well before now. All they do provide is the Owner's Manual and a list of replaceable parts for your unit.
http://www.hunter-humidifiers.com/manuals/34357.pdf Just in case you have misplaced yours.
Certainly, if you call their Tech Service Dept 1-888-830-1326, they may furnish one to you via email with an attachment, as well as sell you any parts you may need. If your unit is not still under the Five Year Limited Warranty.
Good luck and hope this helps you get the schematic you need.