Have a look at the documentation of the VennDiagram package: https://cran.r-project.org/web/packages/VennDiagram/VennDiagram.pdf. Alternatively, see this website at UCLA: http://www.ats.ucla.edu/stat/r/faq/venn.htm.
In the meantime, a more simple and intuitive package has been published in CRAN. For anyone (still) interested in the topic, have a look at the package "venn":