Below abc is your userid and xyz is your group.

If your desktop is Linux or Mac OS (with X11 installed)

ssh -X abc@hyak.washington.edu
srun -p xyz -A xyz --time=2:00:00 --mem=100G --pty /bin/bash
module load visit_2.6.2
visit

The visit GUI should appear on your desktop.

If your want to use a Visit client on your desktop and connect to hyak
put below line in your hyak .bashrc file.

module load visit_2.6.2

Also see Chapter 13 on "Remote visualization" in below manual:

https://wci.llnl.gov/content/assets/docs/simulation/computer-codes/visit/VisItUsersManual1.5.pdf