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