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