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