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)(19,25)(20,30)(21,26)(22,24)(23,27)(28,29)(31,32)(1,2,5,6)(3,7,4,8)(17,19)(18,23)(20,28)(21,29)(22,27)(24,25)(26,31)(30,32)(10,14)(11,15)(18,24)(19,27)(21,30)(28,31) involution — undirected(1,3,5,4)(2,7,6,8)(9,11)(10,12)(13,15)(14,16)(17,19)(18,25)(20,31)(21,29)(22,27)(23,24)(26,28)(30,32)(1,3,5,4)(2,7,6,8)(9,12)(10,11)(13,16)(14,15)(17,20,22,26)(18,21,24,30)(19,28,27,31)(23,29,25,32)(1,4,5,3)(2,8,6,7)(17,21)(18,26)(19,29)(20,24)(22,30)(23,31)(25,28)(27,32)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.