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