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