Not only can you continue your internship following your graduation, you can even extend your OPT for additional 17 months since your degree qualfies under STEM degrees.

For more info, check this out. http://www.uscis.gov/portal/site/uscis/menuitem.5af9bb95919f35e66f614176543f6d1a/?vgnextoid=9a3d3dd87aa19110VgnVCM1000004718190aRCRD&vgnextchannel=68439c7755cb9010VgnVCM10000045f3d6a1RCRD