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