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