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