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