Could be in the "Style Editor" dialog an option to show as many colors as classes in a layer

Could be in the "Style Editor" dialog an option to show as many colors as
> classes in a layer???.
> For instance: in the "Theme" part I can select an "Attribute" (e.g. Species)
> and a number of "Classes" (max 12 classes) but if i would like to have as
> many colors as species are in my shapefile of points, could be an option to
> generate more colors?? a unique color for each specie?