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