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