Most conferences will have some sort of network or group set up for the purpose of bringing together conference attendees for advance networking.
Some might have software dedicated to networking, while others create a private group on Facebook or somewhere else.
After you’ve joined, fill out your profile, so people are able to determine if you are somebody that makes sense meeting. If there is no profile in your particular social network, post an introduction that provides a brief bio and what you’re trying to accomplish at the conference.
That will make it easier for relevant attendees to come to you. Also, seek out others who you hope to meet and make that initial connection.