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