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)(11,16)(12,14)(13,15)(17,18)(19,23)(20,28)(21,30)(22,24)(25,27)(26,31)(29,32)(1,3,4,8)(2,5,6,7)(11,12)(14,16)(17,19)(18,23)(20,29)(21,27)(22,26)(24,31)(25,30)(28,32)(9,11,13,12)(10,14,15,16)(17,20,28,18,22,30,21,24)(19,25,32,31,26,29,27,23)(9,12,13,11)(10,14,15,16)(19,26)(23,31)(25,29)(27,32)(10,15)(14,16)(18,24)(19,26)(20,30)(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.