There are some great fan-designed 3D models, many very faithful to the original blueprints, that a snapshot could work quite well for a tabletop battle-grid. Credit always goes to the 3D modeler. I only add missing bits and a bit of colour. Search here for the full series.
Here is the Sovereign-Class Main Engineering model designed by the amazing Collin E.. No edits needed. Here is an example screenshot of his 3D model.
Both upper level and lower level layouts are given here, for 8.5″x11″ scale. The two should overlap.
Sovereign Class Engineering (Lower) PDF
Sovereign Class Engineering (Upper) PDF