The simplest code for viewing these graphs would rely on interactivity by rendering it to an entire website you can surf, taking advantage advantage of all the accessibility tooling we'd build!
But sighted folk would want to see the entire graph onscreen at once! Layout is the tricky bit here, using a physics-inspired sim. Which if computed & rendered live appears more interactive, interesting, & performant! It'll take a few workarounds to run on our Layout Coprocessor...