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