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