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