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