Each participant's availability can be viewed in a list in the event overview. But there is also the possibility to view all responses in a matrix overview, in which you can see everyone's responses at a glance.
To view the matrix overview, navigate to the When? section in the event overview, click 'options' and then 'show matrix overview'.
A matrix overview will pop up and you will be able to see all responses at a glance. You can also export the matrix overview to Excel.