  The dipole-dipole interaction between two Rydberg atoms depends on the
relative orientation of the atoms and on the change in the magnetic quantum
number. We simulate the effect of this anisotropy on the energy transport in an
amorphous many atom system subject to a homogeneous applied electric field. We
consider two experimentally feasible geometries and find that the effects
should be measurable in current generation imaging experiments. In both
geometries atoms of $p$ character are localized to a small region of space
which is immersed in a larger region that is filled with atoms of $s$
character. Energy transfer due to the dipole-dipole interaction can lead to a
spread of $p$ character into the region initially occupied by $s$ atoms. Over
long timescales the energy transport is confined to the volume near the border
of the $p$ region which is suggestive of Anderson localization. We calculate a
correlation length of 6.3~$\mu$m for one particular geometry.
