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