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