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