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