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