It's called paleontology - you can get a lot of info from a fossil. Much like forensics, a lot of information in a fossil is invisible to the unaided eye. If you'd really like to see all the steps it takes to get from the raw fossil to the reconstructed image, and aren't just being flippant about it, I'd suggest reading more about paleontology and possibly looking up the actual journal where this find was recorded. Me, I'm not an expert at paleontology, so I can't help a whole lot.
Vetustovermis is potentially one of the most important fossil finds of all time, if it indeed is what it is thought to be. Hopefully more fossils from its era will be found in the future.
"I'd like to see the steps that one takes to get..."
Howdy there Elsie;
I'd say they have very, very vivid imaginations.