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