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