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