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