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