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