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