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