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