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