One vertex per element, one color per generator, with an edge from x to x·s.
(2,4)(5,6)(7,8)(9,10,13,14)(11,16,12,15)(17,18)(19,22)(20,25)(21,24)(23,28)(26,29)(27,31)(30,32)(10,14)(15,16)(18,19)(21,29)(23,25)(27,32) involution — undirected(6,8)(9,11,13,12)(10,15,14,16)(17,19,22,18)(20,25,28,23)(21,26,29,24)(27,31,32,30)(1,2)(3,4)(5,6)(7,8)(9,12,13,11)(10,16,14,15)(17,20,22,28)(18,23,19,25)(21,27,29,32)(24,30,26,31)(9,10)(11,15)(12,16)(13,14)(17,21,22,29)(18,24,19,26)(20,27,28,32)(23,30,25,31)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.