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