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)(11,13)(12,14)(15,16)(17,18)(19,27)(20,21)(22,26)(23,25)(24,29)(28,30)(31,32) involution — undirected(2,6)(7,8)(9,11,12,15)(10,13,14,16)(17,19,21,29,23,31,22,30)(18,24,26,27,25,28,20,32)(1,3,5,4)(2,7,6,8)(17,20,21,18,23,26,22,25)(19,28,29,32,31,24,30,27)(1,4,5,3)(2,8,6,7)(10,14)(13,16)(18,25)(20,26)(24,28)(27,32)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.