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