It's a 7805 (not 7508), and any 7805 datasheet will have an example circuit. Looking at the front of the device the pins are Vin, GND, Vout. A 10uF electrolytic capacitor between Vin and GND and a 1uF cap between Vout and GND are the most common values.
The LED is just a power-on indicator, and the LED sets the current for the LED. It's probably 330 to 470 ohms.
sorry, don't have a schematic.
-j