Your Divi theme comes with 32 pre installed page layouts ready to load into a page via your Divi page builder.
You can view a demo site with all 32 Divi page layouts loaded on a fresh install of WP and Divi Theme.
To load the page layouts you will need to be using the page builder and select the load layout button.
Then select your layout from the list and click on the load button. Note the checkbox at the top which will determine if your selected page layout should replace any content you have currently on the page. If you want to add to any content you currently have leave the checkbox unchecked.