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