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