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