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