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