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