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