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