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