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)(11,15)(12,16)(13,14)(17,18)(19,23)(20,27)(21,30)(22,25)(24,26)(28,32)(29,31) involution — undirected(2,7)(3,5)(4,11)(8,10)(9,16)(12,13)(17,19,22,21)(18,23,25,30)(20,28,29,26)(24,27,32,31)(1,3,6,5)(2,8,10,7)(4,11,12,13)(9,15,16,14)(17,20,22,29)(18,24,25,32)(19,26,21,28)(23,31,30,27)(1,4,6,12)(2,9,10,16)(3,11,5,13)(7,14,8,15)(2,10)(7,8)(9,16)(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.