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