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