If you have a page layout whose arrangement you like, duplicate it (just the sheet). Then double-click on each graph to bring up a dialog where you can choose a different graph for that slot.

Prism offers a direct way to clone a graph from the Welcome (File..New) dialog, but does not allow cloning of layouts. However, you can accomplish the same goal by going to a layout, dropping the New button, and choosing to Duplicate Family. This will duplicate not only the layout, but all graphs on the layout and all results and data sheets linked to those graphs. Edit all the data tables, and you are done. The analyses and graphs will automatically update.