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