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