Hey Chloedempsey,
If you're casting your music to your Chromecast using your Google Home app, we don't have an option to shuffle your songs. We're always looking for ways to improve and we'll take it as feedback. I also suggest that you send feedback by following the steps on this link. Let me know if I can assist with anything else, otherwise I’ll be locking this thread after 24 hours.
Best,
Alex
