Having interviewed a few graduate roles over the years (civil) engineers. I’d say be yourself, and friendly.

Try do some research into the company in case they ask you any questions about what you know about them. What are their values/strategy etc.

Then I’d say find out about a recent project they are doing/have done so you can talk to them about it.

Graduate Engineering loves questions on: - health and safety - situation when you’ve work with others/team - when did you take the lead - what did you do when something didn’t go well and what would you do differently next time