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