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)(17,18,20,22)(19,25,27,23)(21,24,29,30)(26,31,32,28)(1,3,4,8)(2,5,6,7)(17,19,21,28,18,23,24,32,20,27,29,31,22,25,30,26)(10,13)(14,16)(18,22)(19,26)(21,30)(23,31)(24,29)(25,28)(27,32) involution — undirected(2,6)(5,7)(9,11,12,15)(10,14,13,16)(19,27)(23,25)(26,32)(28,31)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.