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