The file raydisp.lst (output by OS) contains the coordinates, lengths, and normal vectors for the rays of the residue(s) you specified in the os.fil file (if you entered a "y" on the last line)..
Copy the os_v76/bin/Disp_dots.py and Disp_rays.py files to your working directory (where the raydisp.lst file is located).
Launch PyMOL in your working directory and in the command window type,
select os_res, resid [whatever_residues_listed_in_os.fil]
Display the os_res object as spheres.
Then type the following in the command window,
run Display_dots.py and follow the prompt.
or
run Display_rays.py and follow the prompt.