Hello,
Your site is under maintenance, please provide the access as I am not sure which filters do you mean.
If you want to make swatches for your attribute filters, please do the following:
Please navigate to Dashboard -> Products -> Attributes -> Color -> Configure iterms, enable swatch as shown http://prntscr.com/jskm29
Navigate to Theme Settings > Shop > Attribute swatches > choose pa_color (your color attribute) and enable “Use images from product variations”
Make sure each variation in a variable product has an image: http://prntscr.com/kk870w
Best Regards