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