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