Here is the industry secret: The Xerox Phaser 3116 is actually a rebranded or ML-1610 series. When Xerox partnered with Samsung for their entry-level printers, they shared the internal engine. This means the official Xerox drivers for Win 7 32-bit are virtually non-existent, but the Samsung drivers work perfectly.
This happens if you used an INF file from an unofficial source. xerox phaser 3116 driver win 7 32bit
If you cannot get the native Vista driver running, try these backup methods on Windows 7 32-bit. Here is the industry secret: The Xerox Phaser