Drain pasta and immediately bring to room temperature by running cold water through the pasta. Dry very well before adding to bowl with peppers and carrots (you can use a paper towel to remove excess water from pasta).
Add mayo, apple cider vinegar, salt and pepper and mix well. Cover with saran wrap and let chill for at least 1 hour. Before serving/enjoying, taste and add more salt and/or pepper to your liking. You may also want to add more mayo before serving if you want it creamier, since the mayo will absorb into the pasta during refrigeration.