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