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