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