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