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