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