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