if things went well, you could reach the graphic interface from any other device in your lan at the address http://volumio.local (or http://<IP_OF_ASUS_EEE>).
but sometimes things don’t go fine: see this post:
X86 Hardware issues (WiFi, DAC, Disks, Boot etc.) - #245 by fo02667
in my case, my pc had not enough hardware resources to let the things go fine:
https://community.volumio.com/t/re-x86-hardware-issues-wifi-dac-disks-boot-etc/55915