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