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