If you want a good tool to perform a site security evaluation then one I would recommend would be from the Department of Homeland Security (DHS) which provide a free tool called Cyber Security Evaluation Tool (CSET). This tool provides users with a systematic and repeatable approach for assessing the security posture of their cyber systems and networks. It includes both high-level and detailed questions related to IT systems.
Not only does it come with a lot of pre-loaded questionnaires and network templates with linked equipment questions(based on DrawIO) and produces a good selection of reports ranging from summary level to detailed.
Pretty much everything can be customized. You can load your own questionnaire templates, create your own network diagram template, edit the questions to be asked dependent on the items you add to the diagram as well as customize the reports produced at the end to add that professional look touch.
