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