Aria here, one of the Social Care gurus at Shopify.
We have quite a lot of wholesale apps in our app store but I think the one that may be closest to the functionality you're looking for is One Page Bulk Order. The interface is different to the one in your screenshot (which may have been custom coded) but it allows you to order all products on one page, shows real-time inventory from your warehouse and you can enter the quantity for each product before submitting the whole order.
If it's not exactly what you're looking for, you could consider hiring a Shopify Expert to create something custom for you.
How are you getting on otherwise with your store setup? What sort of products will you be selling? What other features are you looking for?
Ah, that's disappointing. I hope you manage to find an expert who can create something custom that will work for you.
Social Care Guru
You can achieve this by using the MultiVariants ‑ Bulk Order app. You can display variants into a tabular/grid layout with the swatch for one option.
Here is an example product you can take a look at Variants Grid/Matrix layout with a swatch (3 Options)