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