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