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