We're currently 15th in the UEFA coefficient rankings. Assuming the league finishes today (I assumed Madrid will win La Liga despite them not being first at the moment, just to make this whole thing easier), the pots will be:
Pot 1 (League winners of top 7 leagues + CL winners): Real Madrid, Bayern, Chelsea, Juventus, Monaco, Spartak Moscow, Benfica, Shakhtar Donetsk (As it's very likely the CL finalists Juve or Madrid will win the title, the extra CL spot goes to the 8th best league winner which is Ukraine's Shakhtar Donetsk).
The remaining pots are based on the remaining teams in the UEFA coefficient rankings
Pot 2: Barcelona, Atletico Madrid, PSG, Dortmund, Sevilla (have to go through a qualifier), Man City (qualifier), Porto, Man United
Pot 3: Napoli (qualifier), Spurs, Basel, Dynamo Kiev (qualifier), Ajax (qualifier), Olympiacos, Anderlecht, Liverpool
Couldn't be bothered with pot 4, but you get the idea. Obviously it depends on a lot of things as the season isn't over yet but I'd say we'd be between pot 2 and pot 3. For example, if Arsenal do manage to qualify over Liverpool, we'd go down to pot 3 as Arsenal have a higher coefficient than us.
If we do get into pot 3, it's entirely possible we could get a group like
Real Madrid
PSG
Man United
Napoli