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