The documentation alone, in .pdf format. This exhibits all diagrams with their file names.
A whole directory of stuff, including documentation and the figures *.eps in a gzipped tar file. After unpacking it (into a directory called springer), the figures for inclusion are in the subdirectory springer/figures. A sample TEX file is springer/roots.tex.
The diagrams are all at a fixed size. This can be scaled within a TEX file through various dvips commands. Other parameters of the digarms (the width of lines etc.) can all be set independently, but this requires more work. Instructions rae in the documentation.