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