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