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