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