Connectomes require not-so-accessible equipment such as fMRI or MRI machines. Nevertheless, the best way to visualize it in my opinion is via the Brainstorm package (created by University of Southern California) in MATLAB.

Honestly, the holy grail is really here and it is open sourced. It only requires EEG: https://direct.mit.edu/neco/article-abstract/33/4/967/97477/...

You can use FreeEEG32 with the prior link, which is coming out very soon (I spend a lot of time with the discord chat people who created this system): https://www.crowdsupply.com/neuroidss/freeeeg32

To use dry active electrodes (in lieu of wet electrodes—aka gel in your hair) with FreeEEG32, you can make your own EEG cap with dry electrodes—using this page to figure it out: https://hackaday.io/project/13285-openld-lucid-dreaming-rese...