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