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