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