I'm presuming the numbers on the left are the characters' ages. As for the asterisks, I'm unsure.
Transcript follows. Image kindly supplied by Henry, who tells me the original is on display at Coppola's Winery in California.

Image: Henry
Transcript
CAST
Don Corleone:
Marlon Brando
Laurence Olivier
*Frank Dekova
John Marley
Carlo Ponti
Michael Corleone:
*Al Pacino
*Scott Marlowe
Mike Margota
(Richard Romanos)
Jimmy Caan
Martin Sheen
Robert di Niro
Art Genovese
Dustin Hoffman
Mike Parks
SONNY CORLEONE:
*Jimmy Caan
Carmine Caridi
*Scott Marlowe
*Don Gordon
*(Tony Zerbe)
*Lou Antonio
(Paul Banteo)
Robert Viharo
(Rudy Solari)
John Saxon
John Brascia
Johnny Sette (7)
Adam Roake
Ben Gazzara
Harry Guardino
Tony Lo Bianco
Peter Falk
Al Letteiri
TOM HAGEN:
Ben Piazza
*Robert Duvall
Tony Zerbe
*Peter Donat