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