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)(17,18)(19,23)(20,24)(21,22)(27,31)(28,30) involution — undirected(2,6)(7,8)(9,11)(10,15)(12,13)(14,16)(18,22)(19,24)(25,26,29,32)(27,28,31,30)(1,3,5,4)(2,7,6,8)(9,12)(10,16)(11,13)(14,15)(17,19,21,24)(18,23,22,20)(25,27,29,31)(26,30,32,28)(1,4,5,3)(2,7,6,8)(9,12)(10,11)(13,16)(14,15)(17,20)(18,19)(21,23)(22,24)(25,26)(27,30)(28,31)(29,32)(1,2)(3,7)(4,8)(5,6)(9,13,14,10)(11,15,16,12)(17,18)(19,23)(20,24)(21,22)(25,28,29,30)(26,31,32,27)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.