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