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