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