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