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