The Speaker gets its delegation from the union council. 

The position description for the event can be found at: 
https://drive.google.com/drive/u/0/folders/0B8uSEPFZ2uc7Q0x5NEhYUnJBdzg

Unfortunately these are only in Swedish but if you want to know more about the position, send a mail to styrelsen@utn.se and they will be happy to tell you more about it.