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