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