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