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