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