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