Actually you will first need to create a content template. On that content template editor you will see a button that says edit using visual composer in the right hand corner of the editor.
Update....I was able to get the content template to show on my "attractions" post type but I still can't see the visual composer content. If I click on "Edit this content template", I do see it. How can I edit the content for this specific post type?? See attached screenshot.