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