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