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