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