Actually, the information appears immediately AFTER you respond to the colonizing event dialog.
The problem with this is that you've ALREADY committed to colonizing that planet, be it Heaven, Hell, or made of cheese. At that point, it's kind of hard to put that toothpaste back into the tube. Unless you save before colonizing and reload the old save if you don't like the layout. Quite frankly, even a bad planet is simply not worth that much trouble, but is definitely deserving of a "preview" of the planet's layout.
Again, I go back to the logic that no righteously advanced spacefaring civilization would land on a rock without first scanning the damned thing or sending probes down, if not to ensure that there are no giant cats with magic sceptres or evil aliens who look like Elizabeth Taylor. Hell, we've already done that with various Mars landers, and we already knew beforehand that the first colonists to arrive wouldn't be expecting to have any bikini beach days with blue skies, sun, and surf on THAT planet.
Just let me do my due diligence and scan the planet from orbit before I crash it and scare the giant worms.