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