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