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