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