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