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