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