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