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