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