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