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