using swarm plot with different colors for categories

Hello,

I have a table with three columns:

    Celltype      Age       HoleVolume
    ________    ________    __________

     "TH"       "8-12w"       31813   
     "LXL"      "18-21d"      30740   
     "LXL"      "8-12w"       24594   
     "LXL"      "12m"         18981   
     "LXL"      "8-12w"       16863   
     "LXL"      "12m"         15584   
     "LXL"      "8-12w"       13282   
     "LXL"      "8-12w"       13156 

now, I want to generate something like a swarm plot, where the grouping is according to "celltype" but the colors are based on "age".

I was trying to do that using the plotSpread function, but it doesn't seem to recognize more then one category...

Is there a simple way to do this? (consider that "Age" and "CellType" are categorical, and that "Age" contains 6 categories).

Thanks a lot!

Sapir.