There are 2 options available to an international student with a Bachelors degree seeking to immigrate to Canada.
One, apply to a provincial nomination program (PNP). If you get a nomination, you can apply to the Federal government through the paper based system. It takes a longer time than the second option though to get PR.
Two, apply through Express entry. If applying through the Express Entry system, you'll need to get either nominated by the express-entry stream of a PNP or LMIA-based job in order to get the additional 600 points to qualify you for a draw. Your points from just a Bachelors degree will not qualify you to be invited under express entry. You can use the free CRS calulator on this site or the CIC website to have an idea of where you stand, pointwise.
Summary, its certainly an uphill task to get PR with just a bachelor's degree but not impossible.