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