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)(18,23)(19,26)(20,21)(25,29)(27,28)(30,31) involution — undirected(1,3,5,11)(2,6,7,15)(4,13,14,10)(8,16,12,9)(17,18,22,25)(19,24,28,32)(20,23,21,29)(26,30,27,31)(1,2)(3,6)(4,8)(5,7)(9,10)(11,15)(12,14)(13,16)(17,19)(18,24)(20,26)(21,27)(22,28)(23,30)(25,32)(29,31) involution — undirected(17,20,22,21)(18,23,25,29)(19,26,28,27)(24,30,32,31)(2,7)(6,15)(8,12)(9,16)(17,20,22,21)(18,23,25,29)(19,27,28,26)(24,31,32,30)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.