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