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