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