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