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