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