One vertex per element, one color per generator, with an edge from x to x·s.
(9,10,14,16)(11,13,12,15)(17,18)(19,25)(20,24)(21,22)(23,27)(26,31)(28,29)(30,32)(6,8)(9,11)(10,15)(12,14)(13,16)(18,22)(20,28)(23,25)(26,32) involution — undirected(1,2,3,4)(5,6,7,8)(10,16)(11,12)(17,18)(19,25)(20,24)(21,22)(23,27)(26,31)(28,29)(30,32)(9,12,14,11)(10,13,16,15)(17,19,21,27)(18,23,22,25)(20,26,28,32)(24,30,29,31)(9,13)(10,11)(12,16)(14,15)(17,20,21,28)(18,24,22,29)(19,26,27,32)(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.