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