Printable Blender 2.8 keymap out there?

There really isn’t one; I would recommend opening the Keymap editor in Blender and taking a look at the section(s) you’re most interested in. For example I spend a lot of time in Edit mode so I go into 3D View → Mesh → Mesh (Global) the most. Also keep in mind that a lot of hotkeys are based on the first letter of the tool. E for Extrude, I for Inset, S for Scale, etc.

There’s also this project going on, which I personally approve of, and it includes a spreadsheet of the keys which I’m sure you could print.

Something I do is keep a text files open inside Blender’s text editor with all of my custom hotkeys. This stays visible on my screen at all times, unless I change the window to something else.

Lastly, most of that infographic yogyog posted is still accurate, even with the (current) default 2.80 keymap. However, it’s super busy and hard for me to read, but still usable.