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