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