No there are no such customization using facets for this component.
Ok, so there is no way to customize it.
In rich:inputNumberSlider we have inputPosition as left and right only.
Can we customize this to top or bottom.
In future release will allow as such customization?
No it also not possible to position the elements vertically. You could rise RFC or add this feature request at wiki so the community will vote for it.
Or you could implement custom renderer for this component