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