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