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