To run a graphical interface, you'll want to connect over VNC with a client like TightVNC or RealVNC. First, lets get everything installed and set up on the server.
First we'll install the GNOME desktop:
sudo yum groupinstall "GNOME Desktop"
Next we'll install the VNC server:
sudo yum install tigervnc-server
The next step is to setup VNC to start at boot and create a user to login with. Copy the systemd service file:
cp /lib/systemd/system/vncserver@.service /etc/systemd/system/vncserver@:1.service
Now create a new user:
/etc/systemd/system/vncserver@:1.service and replace
Finally start the server:
su - vncuser
systemctl enable vncserver@:1.service
systemctl start vncserver@:1.service
You should now be able to connect to the server using a VNC client at your.ip.address:5901