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