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