Callahan Creek, a Lawrence-based advertising and marketing firm, has opened a West Coast office so that it can keep up with its newest client: Toyota Motor Sales.

Callahan Creek said it opened the new office at the Toyota Motor Sales national headquarters in Torrance, Calif., where the firm will have eight employees, including three who already have relocated to the site from Lawrence.

The firm will handle “internal graphics” for Toyota, said Cindy Maude, president and chief executive officer of Callahan Creek. Employees in Torrance will handle daily management of the account, while the bulk of creative work will be handled out of the Lawrence office, 805 N.H.