Simple bash script to batch convert graphs descriptions (dot format) into a pdf. It requires graphviz.

dot2pdf.sh

#!/bin/bash
for GFILE in *.dot;
do
    GNAME="${GFILE%.*}";
    GTYPE=$(head -n 1 $GFILE);
    case "$GTYPE" in
        *digraph*) dot -Teps $GFILE -o "$GNAME.eps";;
        *graph*) neato -Teps $GFILE -o "$GNAME.eps";;
    esac
    ps2pdf -dCompatibilityLevel=1.4 -dEmbedAllFonts=true -dSubsetFonts=true \
    -dEPSCrop "$GNAME.eps" "$GNAME.pdf";
done
#rm *.eps