Bring a large pot of lightly salted water to a boil. Cook pasta in the boiling water, stirring occasionally, until tender yet firm to the bite, about 10 to 12 minutes; rinse under cold water and drain.,In a large bowl, combine the cooked pasta, cherry tomatoes, green bell pepper, red bell pepper, yellow bell pepper, and black olives.,In a separate bowl, whisk together the Italian-style salad dressing and salad seasoning mix.,Pour the dressing over the pasta and vegetables. Toss to combine.,Cover and refrigerate for at least 2 hours before serving to allow flavors to meld.