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