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