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