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