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