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