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