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