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