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