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