There's really not a great way to do that directly on Facebook as far as I know; however, if you right click on a playlist, you'll see an option to "copy embed code." You can paste that anywhere that will allow the html.
With that, your playlist looks like below:
Still, I don't know a way to get that directly on Facebook. Maybe someone else has a way.
dinomightRock Star 10
Help others find this answer and click "Accept as Solution".
If you appreciate my answer, maybe give me a Like.
I think this is down to a Facebook change, I can only get the same to appear now too (not the 5 tracks it used to show). Looking at the Facebook debugger, it is scraping the information from Spotify fine, so it is just choosing to display it incorrectly.