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