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