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