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