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