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