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