While writing this answer I was wondering whether the analogy of the nature of entanglement in the GHZ state with Borromean rings is more than a mere analogy (cf. Aaronson's lecture).
The question in my mind basically is: can quantum entanglement, at least for the finite-dimensional cases, be expressed in terms of knot theory? Has there been any approach in this direction? If yes, then I suppose it would be a nice way to visualize qubit entanglements in various scenarios.