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