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