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