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