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