Yeah, they usually visit campuses and encourage first years to sign up. As would Professionals Australia.
You can sign up here, you get a membership card and can technically use the postnominal "StudIEAust": https://www.engineersaustralia.org.au/Membership/Membership-Benefits/Student-Membership-Benefits
What I will warn you about though is that after graduation, membership isn't free and they will try to contact you about becoming a member. Professionals Australia on the other hand charge a small fee for students, but this automatically ramps up as you graduate and (while tax deductible etc.) a few years after graduation it's a non-trivial amount of money.
With the low fees or free membership for students, and while hunting for internships/grad positions, I think it can only help joining these types of associations but once in industry it's worth re-evaluating your membership based on what you're getting out of it.