I think three crewmen died when it hit the mine & the Quartermaster died a few hours after from injuries he sustained. If there were any memorials I imagine they may be in Dublin, as the ship was owned by the City of Cork Steam Packet Company.
Looks like a gentleman called Carl leckey was/is trying to "personally financing fifteen memorial plagues to be located along the promenade in the vicinity where the ships, tugs etc were sunk in war and peace on the River Mersey. Inserted is the plaque I designed and had manufactured in memory of the Innisfallen" see more at
http://www.irishships.com/memorial_to_the_irish_seamen.html#_Carl_Leckey