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