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