After activating the switch and platforms in the room with the compass, jump to the enclave to the left. Watch out for the Skulltula that drops from the ceiling. Inside the enclave is the Gold Skulltula.
Gold Skulltulas make a scratching noise. Use this to find them. Shoot them and recover their tokens. There are a few more in this dungeon, and many in the overworld.
Start to collect Gold Skulltula tokens early in the game, as they will be useful to obtain key upgrades later. Be sure to read the Gold Skulltula guide for more info.