you can buy plastic disposable aprons,just as you can gloves,i used to use them when a chef,light,compact and inexpensive,sure they would do the trick,get them off ebay maybe or a catering outlet
I have a plastplugs cutter – it’s simple, you put a sponge on top of the tile you are cutting, this catches everything! I have an old sponge that stays on the wet cutter for exactly that reason and it’s such a habit I don’t even notice me putting the sponge on and off. (an old Ardex or BAL ‘brick’ sponge is perfect)
Please don’t cut backwards. It’s dangerous and the spray is still going to go all over the place.