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