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