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