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