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