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