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