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