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