First, open up your story and click on "Share". On the 'Embed' tab, you will have to make your story public to access the embed code. You can then copy the embed code and paste it into Google Sites.

Here are the steps when you're logged into Google Sites:

1. Click on "Embed" and add a block to your Google Sites
2. Embed from the web and paste the Sutori Embed code

3. Click Next and it should display on your site
4. You may have to expand the display to fully showcase the story