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