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