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