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