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