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