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