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