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