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