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