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