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