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