[FX] Make graph target printouts more user-friendly (#50296)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/50296
Test Plan: Imported from OSS
Reviewed By: pbelevich
Differential Revision: D25855288
Pulled By: jamesr66a
fbshipit-source-id: dd725980fc492526861c2ec234050fbdb814caa8
