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