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