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