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