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