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