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