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