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