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