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