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