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