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