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)(17,18,24,27,23,29,21,31)(19,30,20,22,28,25,32,26)(1,2,4,5)(3,7,8,6)(9,11,12,15)(10,13,14,16)(17,19)(18,25)(20,24)(21,32)(22,31)(23,28)(26,27)(29,30)(10,14)(13,16)(17,20)(18,26)(19,21)(22,29)(23,32)(24,28)(25,31)(27,30) involution — undirected(1,3,4,8)(2,6,5,7)(17,21,23,24)(18,27,29,31)(19,20,28,32)(22,30,26,25)(17,22,24,25,23,26,21,30)(18,28,27,32,29,19,31,20)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.