Open Source tools to draw a set of 2d molecular graphs from sdf file
An SDF file is just a bunch of MOL entries in a single file; $$$$ serves as the separator for the individual entries. 

Splitting into individual files AND simultaneous conversion to graphic file formats (PNG, SVG) is possible with Open Babel, either directly on the command line or through scripts/programmes using the bindings available for various programming languages, such as Pybel for Python.

To my knowledge, the direct generation of PostScript files - probably the nicest option when using $\LaTeX$ - is not possible, so you might want to used SVG as an alternate vector-based format.

obabel -isdf lotsofstructures.sdf -m -osvg -xC -xu -xd -O basename.svg

will do the job. 

-isdf specifies the input file format, -m does the splitting, -osvg specifies the output file format, and -O basename.svg specifies the prefix and extension for the individual numbered output files that are generated. -xC prevents that terminal carbon atoms are printed explicitly with attached hydrogen atoms. Surely a matter of taste, but I wouldn't want to have lots of $\ce{-CH3}$ in the drawings. -xu prevents the use of colour for heteroatoms and generates a black and white drawing. -xd suppressed the name of the compound to be written and displayed in the SVG file.

This should work for SDF files with 2D and 3D coordinates, but in the latter case I'd suggest to check it carefully; I've seen 3D -> 2D transformations on some molecules that went wrong.