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