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