Colonial Space Grunts v2

How do a turn works on Colonial Space Grunts? Do every player do his attack action and when every player did it a card is drawed, or a player attacks and draw a card afterwards? I found this kinda confusing and it wasn’t explained on the paper.

Also we’re recruiting gamers to the Colonial Space Gruntscord to play it in a random corner on maintenance while hiljack happens. (or just in the FOB)

As far as I’m aware you don’t draw cards in the middle of a fight. Fights alternate between the players rolling GUN to hit the enemy and then the players rolling RUN to avoid being hit.
The card drawing is to generate an encounter, so before the fight starts the GM would have drawn a card to generate the encounter. You would only draw a new card once the fight is over and you are generating a new encounter