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