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