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