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