Looks cool. What do the colors of the nodes mean? If they represent parties, then you have probably merged PO into PiS. Also, how do you choose which nodes to label?
Colors are mapped to parties. po is on left (light blue), pis on right (dark blue). As is pretty clear, claimed affiliations don't match real behavior.
Layout = forceatlas2 and labeling is random due to a glitch (normally biggest node in a region.)
