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