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