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)(11,15)(12,13)(14,16)(17,18,22,26)(19,27,29,24)(20,23,28,32)(21,31,30,25)(2,5)(6,8)(9,10)(11,14)(12,13)(15,16)(19,28)(20,29)(21,30)(23,24)(25,31)(27,32) involution — undirected(1,3,4,7)(2,6,5,8)(10,13)(14,15)(17,19,21,20,22,29,30,28)(18,23,25,27,26,32,31,24)(9,11,12,16)(10,14,13,15)(17,20,30,19,22,28,21,29)(18,24,31,32,26,27,25,23)(2,5)(6,8) 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.