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