there are really not special vacuum cleaner available in the market .
It is really not advisable to vacuum clean your cat .you have to be very cautious while doing so as you may scare the cat by the noise and sometime by the accidently stuck your cleaner to the cat skin ( it really scary for the pet).

Instead you brush you pet everyday this will help to clean as well as MASSAGE THE SKIN by increasing the circulation of blood.
Brush also help to find out the skin affection if any

still you want one --buy any small low power/speed hand held portable vacuum cleaner .look for the smallest portable one .

hope this will help