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