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