64-bit version of libz.so can't be used by 32-bit version of libmysqlclient.so.
You have to download proper version of libmysqlclient.so from mysql.com. Alternatively, you can download mysql sources and compile the library by yourself.
You have to have 32-bit version of library if you use 32-bit version Parser + driver. You have to have 64-bit version of library if you use 64-bit version Parser + driver.