We recently ran a hint about displaying just one calendar quickly in OS X Calendar. A commenter said, "Anyone know how to show just one calendar and then go back to the group of calendars that were previously checked? That would be awesome."
It turns out that Daniel Jalkut of Red Sweater Software came up with a way to do just that . Using AppleScript and GUI scripting, he found a way to toggle to a single calendar and back to all calendars. Have a look at his blog post and download the script, edit it for your calendar names, and you're in business.
Mac OS X Hints
http://hints.macworld.com/article.php?story=2013011700254147