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