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