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