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