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