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