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