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)(19,22,26,31)(20,23)(21,24)(25,28)(27,29,32,30)(1,3)(2,7,9,15)(4,12)(5,13)(6,11)(8,10,14,16)(17,19)(18,22,24,31)(20,27)(21,26)(23,29,25,30)(28,32)(18,23)(20,28)(22,29)(24,25)(27,32)(30,31) involution — undirected(3,11)(7,15)(10,16)(12,13)(18,24)(19,26)(23,25)(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.