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