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