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