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