I can guide you in how to create an outline; although, I'm not sure that feminist criticism will be easily compared with Lord of the Flies. You may want to try something a little easier. In order to write an outline, you will need to first brainstorm your topic. Then, you will want to select one idea from this brainstorm.
Once you have selected and narrowed your topic, you will want to find examples which support your main idea. List your examples and then place a list of supporting details under each example. Once you have finished listing, you can use each section of your outline to write a separate paragraph in your paper.
I have included a link to several sample Lord of the Flies outlines. They do not focus specifically one chapter 8, but you can get a general idea of what an outline might look like.