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)(11,14)(12,16)(13,15)(17,18,23,21,22,25,20,30)(19,26,27,29,28,24,31,32)(1,3)(2,5)(4,8)(6,7)(9,11,13,12)(10,14,15,16)(17,19,22,28)(18,24,25,26)(20,31,23,27)(21,32,30,29)(9,12,13,11)(10,14,15,16)(17,20,22,23)(18,21,25,30)(19,27,28,31)(24,29,26,32)(3,8)(5,7)(18,25)(19,28)(21,30)(27,31) involution — undirected(2,6)(5,7)(17,21,23,25,22,30,20,18)(19,29,27,24,28,32,31,26)A 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.