You'd go after a exploring a 'hidden public' kink first.
Try something from the list: ben wa balls, crotch rope, a touch of toothpaste on your clit, a butt plug, an egg vibe, no panties, clothespins on your labia, edge.
From the outside use other advice posted already - high heels, stockings, push up bras, smart make up, red nail polish, all standard tricks.
Mmm. I’d. Take toys to work if I were you... leave them on your desk for them to b found!!!! Also ensure you used them whilst at work!!!
Try you best to not get caught. If you get caught you would have to fuck both guards as a forfeit!!!!