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