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