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