The cheatsheet itself is in Powerpoint; the file plot_cheatsheet.R in the folder "code" creates the images which are saved in the "plots" folder.
To save the cheatsheet as a PDF file, you need to choose "US Letter" under the Paper Size options.
The cheatsheet is also published at the RStudio website.
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.