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