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