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