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