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