There are multiple formats for visualizations. It can be a story shaped like a comic book (like those storyboards for films and television). But it can also be a set of screens for an app. Or parts of a map, that together form one big picture. It can be 2D or 3D, you can use Lego, or other construction materials. The point is: ‘paint a picture’ of what your idea entails.
So find a format that is most fitting to your case, and either find a template or create your own framework. This could be an online format.