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