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