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