IEEE does not have a specific format for lit reviews or methodologies. You can find their full style manual at http://ieeeauthorcenter.ieee.org/wp-content/uploads/IEEE_Style_Manual.pdf, with details on citing references in chapter 5."
Other Helpful Resources:
1) Here is a link to the IEEE Author Center (http://ieeeauthorcenter.ieee.org/create-your-ieee-article/) - I know this resource is for authors publishing with IEEE but it mentions how to properly create an article using their style guide. I took a look and did not see anything about methodologies and lit reviews specifically but perhaps there is something in this resource that maybe helpful to you. Note: The resource includes templates.
2) Take a look at our IEEE database (you can find it using our Databases by Title A-Z list (https://libraries.psu.edu/databases#I) and look for an article published by IEEE with a methodology or lit review in it related to your topic and follow that process. Note: or perhaps use articles you are already using for your own lit review as a model.
3) This guide to writing a technical paper (that appears to incorporate IEEE editorial and reference style) written by a professor at another university might help you. I'm guessing the exact name of the section headings is flexible, while giving you an idea what to write about in each section. http://ecee.colorado.edu/~mcleod/pdfs/UOL/references/howtowrite%20varsamopoulos.pdf
You might also wish to consult your course syllabus or with your professor for more details, or think back to your ENGL 202C class, if you've taken it.