Curious to hear what peoples' thoughts on the various parties are
I'm not too invested in this kind of thing, but Together (pink t-shirts) was the group that ran the MSA this year, and they managed to do things such as reverse some of the Arts cuts, introduce Wednesday Sessions (those mini-festivals on Lemon Scented Lawn, which was one of their big promises), and introduce a sexual consent module for first years. I'm pretty sure a lot of the candidates under the Activate (yellow t-shirts) ticket are from the old Go! group, which ran the MSA for a few years uninterrupted until Together took over this year. If you weren't following the election last year, it was apparently the biggest in awhile, as many people weren't happy with the then current MSA, and Together managed to build a big campaign to contest.
I think Grassroots was aligned somewhat with Together last time, so I'd assume they have similar ideals. Left Action are your activist group. Not sure about the others, but I'm sure they all have Facebook posts or something to promote their policies, etc.