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