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