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