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