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