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