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