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