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