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