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