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