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