An astral suit can be dismissed as a free action.
[...] Forming an astral suit into this form takes a swift action.
[...] Forming an astral suit into this form takes a move action.
[...] Forming an astral suit into this form takes a full-round action.
There is no daily limit on how often you can form an astral suit, so you can dismiss your current choices as a free action, and then form the suit anew as a swift, move, or full-round action. You can do that as often as you like.
Note that you cannot change your customizations as easily—normally, changing those requires 8 hours of work. But the reconfigure ability gained at 3rd level allows some limited changes to be made to your customizations without spending 8 hours.