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