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