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