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