I claim the ornamental design for a visor sleeve, as shown and described.
FIG. 1 is a front view of a visor sleeve; and
FIG. 2 is a back view of a visor sleeve; and
FIG. 3 is a left side view of a visor sleeve; and
FIG. 4 is a right side view of a visor sleeve; and
FIG. 5 is a bottom view of a visor sleeve; and
FIG. 6 is a top view of a visor sleeve; and,
FIG. 7 is a front view of a visor sleeve in use for its intended purpose. The automobile visor portion shown in broken lines form no part of the claim.