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