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