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