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