I've looked through the CUPS documentation, and all I can find that might help refers to fitting the print to the page. There is nothing that specifically refers to setting the number of characters per line.
You have to keep in mind that the numbers of chars per line in the print are limited by font size and page margins. So, set your margins to minimum values, and your font size to something small enough to fit 132 per line.
Then try setting the fit-to-page option in your CUPS config.
The doc gives an example for printing from the command-line.
Scaling to Fit
The -o fitplot option specifies that the document should be scaled to fit on the page:
lp -o fitplot filename
lpr -o fitplot filename
You can also try settings for landscape mode printing, as discovered by this user: