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