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