Answer from @o-laprevote, converted from comment:
Your protein includes intrinsically disordered regions (https://www.uniprot.org/uniprot/Q12802#family_and_domains). Showing a predicted structure may give a wrong idea of what it looks like: I'd consider simply showing the ordered part (of which a structure already exists) plus a "spaghetti" starting from its N-terminal residue.
In this case the ordered regions would be in the "interaction with ESR1" domain (1968-2338), which as you can see has been solved experimentally (PDB 4D0N), and the sequence spanning from 965-1431 (part of it has been solved, PDB 2DRN). What I mean by "spaghetti" is basically: render these two regions then draw curvy arabesques/lines between, before and after them to show it is disordered (starting from their N-terminal or C-terminal).
Such a cartoon is best done in a program that is shows it utterly differently —to not confuse the viewer as this is for display purposes only. Namely, render the parts in PyMOL, but then add the connecting lines in Photoshop or Powerpoint or MS-Paint/Preview.