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