Every form is intended to serve some purpose. Your first step is to identify the purpose, i.e., what you will be using the form for. Decide whether it will be used for official or personal use, whether you need to embed logos in it, whether the printable form will need to filter any data from the company software etc. Once you have identified the function the printable form is expected to perform, you can easily decide which software or online program you need to create the form.
Another downside to using an employment agreement template is the potential for building inflexibility into your business. In particular, employment law changes may invalidate or make an existing agreement out of date. If you use the same job template for hundreds of employees and the law changes, you may need to go back and have them re-sign new contracts. This would not always benefit the company, though it is a small risk to take to get the significant legal protections afforded by even the simplest of contracts.