Any vector drawing tool will let you create a diagram like the example you posted. Examples: Inkscape, Adobe Illustrator, Sketch (Mac only), Affinity Designer, Figma (browser-based with an Electron desktop client). You'll have to design and style the diagram yourself though. With a vector drawing app, there are no constraints on how the diagram could look - the appearance is entirely up to you. Dedicated diagramming…
Disclosure: I work for the Visio team, so if you have any feedback pls lmk.