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