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