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