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