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