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