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