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