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