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