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