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