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