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