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