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