"Students for a Democratic Society: A Graphic History" (Hill and Wang, 211 pp., paperback, $22) interprets a groundbreaking political group of the '60s with words, pictures, and passion. It offers versions of history told by former members of SDS eager to reclaim honor for a group that can lay claim to being the seedbed of the women's liberation and black power movements. After Pekar, artist Gary Dumm, and editor Paul Buhle (a founder of the SDS journal, Radical America), tell the chronological history of SDS, separate accounts of SDS activity in Chicago; Cleveland; Madison, Wis.; and elsewhere round out the picture. Pekar has become an acute pop sociologist, and Dumm's neutral art only underlines the electrical charge of the times.