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)(7,13)(12,15)(14,16)(17,18)(19,25)(20,22)(21,29)(23,27)(24,28)(26,31)(30,32) involution — undirected(1,2,6,10,5,9,4,8)(3,7,15,16,14,12,13,11)(18,22)(23,30)(24,29)(25,31)(1,2,5,9)(3,12,14,7)(4,8,6,10)(11,13,16,15)(17,19,21,27,20,26,28,32)(18,23,24,25,22,30,29,31)(1,3,4,13,5,14,6,15)(2,7,8,11,9,12,10,16)(18,22)(23,30)(24,29)(25,31)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.