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