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