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)(11,14)(12,15)(13,16)(17,18)(19,28)(20,26)(21,27)(22,32)(23,25)(24,30)(29,31) involution — undirected(9,11)(10,13)(12,16)(14,15)(17,19,21,26,23,29,22,30)(18,24,32,31,25,20,27,28)(2,5)(6,8)(11,16)(13,14)(18,25)(19,29)(26,30)(27,32) involution — undirected(1,3,4,7)(2,6,5,8)(9,11)(10,14)(12,16)(13,15)(17,20)(18,26)(19,27)(21,28)(22,31)(23,24)(25,30)(29,32)(11,16)(13,14)(17,21,23,22)(18,27,25,32)(19,26,29,30)(20,31,24,28)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.