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