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)(17,18,23,20)(19,26,29,32)(21,25,22,30)(24,31,27,28)(1,2,4,6,5,8,11,13)(3,7,10,12,9,14,15,16)(1,3)(2,7)(4,10)(5,9)(6,12)(8,14)(11,15)(13,16)(17,19)(18,24)(20,27)(21,28)(22,31)(23,29)(25,32)(26,30) involution — undirected(3,9)(7,14)(10,15)(12,16)(17,20,23,18)(19,27,29,24)(21,25,22,30)(26,28,32,31)(2,8)(6,13)(7,14)(12,16)(17,21,23,22)(18,25,20,30)(19,28,29,31)(24,32,27,26)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.