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