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