In the future we’ll probably have an option to orient the markups control point glyphs using the point’s orientation, but there are no concrete plans. There are many alternative options, though.
Option A: You can get the point positions and orientations from the markups node and use those as inputs for a vtkgGlyph3D filter to generate a model of oriented glyphs.
Option B: Use transform visualization features (oriented glyphs in 2D and 3D, contours, deformed grids, etc.). You can choose to display the vector field at fiducial positions only. If the vectors are already defined with a dense displacement field (bspline or grid) then those can be loaded directly as a transform. If you have the vectors computed for each fiducial only, then you can generate the displacement field using Fiducial registration wizard module (in SlicerIGT extension).
There are many other options, but to be able to give an informed advice, we would need to know what your end goal is. What would you like to visualize for what purpose?