Sure, by looking at the transaction on an explorer.
But unfortunately you'll only see which address received your coins, not who that person in control over the private key is.
If your coins have been stolen, the chance of getting them back is almost zero.
More important is to find out how your coins got stolen. If your computer is infected, more data could be at risk.
Did you receive a popup as shown by erikoy? Or where did you electrum download from?
What OS are you using and where is your mnemonic code stored (PC, paper, email, ..) ?